Results

Plasma concentration of 6 % HES 130/0.4 was highest at end of infusion (5.53 ± 0.55 mg/ml) and decreased following a biphasic manner. Total plasma clearance and rapid and slow elimination half-lives obtained by a two-compartment model were 1.14 ± 0.16 l/h, 1.12 ± 0.26 h, and 9.98 ± 2.38 h, respectively, and the volume of distribution was 4.76 ± 0.64 l. Mean area under the concentration–time curve was 26.7 ± 3.75 mg/ml h. The total amount of HES excreted into urine was 59.4 % of the applied dose. Hemodilution was observed in all 12 subjects as indicated by a decrease of hemoglobin from 15.5 ± 0.4 g/dl at baseline to 13.8 ± 0.4 g/dl after the end of infusion. Adverse events in this study refer to changes of laboratory parameters and were assessed as not clinically relevant.

Conclusion

Single administration of a 500 ml solution of 6 % HES 130/0.4 was confirmed to be safe and tolerable in healthy male Japanese subjects. A rapid renal excretion was observed within 24 h after drug administration, accounting for 96 % of the total amount excreted. A comparison with pharmacokinetic data derived from Caucasians did not reveal significant differences to Japanese and confirmed the good tolerability in both ethnic groups.